Reserving Sandaconda
Sandaconda is a great teammate for Alcremie, as it excels at disposing of the Poison- and Steel-types that threaten Alcreamie. More specifically, it has a great match-up with 3 particular Pokemon: Garbodor, Silvally-Steel, and Togedemaru. Garbodor struggles to even scratch Sandaconda, and fishing for a poison with Gunk Shot won't work either, as Shed Skin will simply remove the aliment. Silvally-Steel can't touch Sandaconda unless it runs Grass Pledge, and even then, taking an Earthquake can heavily compromise Steelvally's ability to check threats later in the game, so it will usually be forced out anyway. Togedemaru does a pittance to Sandaconda with Iron Head, and generally has 0 way of breaking through it.
In exchange, Alcreamie is generally good at sponging hits like Wishiwashi's Scald and other weaker hits for Sandaconda, thanks to Recover. Additionally, it also has the potential to sweep the opposing team after Sandaconda has fulfilled its role.